Threonine is an essential amino acid in humans. It is abundant in human plasma, particularly in newborns. Severe deficiency of threonine causes neurological dysfunction and lameness in experimental animals. Threonine is an immunostimulant which promotes the growth of thymus gland.
The Union Pacific Railroad, Building America. The Union Pacific (UP) is one the largest and most powerful railroads in the country. This historic system has been in operation since before the Civil War and much of the general public has at least a general knowledge of UP since it formed the eastern segment of the Transcontinental Railroad.
railroad. 1  a permanent road laid with rails, commonly in one or more pairs of continuous lines forming a track or tracks, on which locomotives and cars are run for the transportation of passengers, freight, and mail.